Personalization vs. Specialization

Do you personalize learning or specialize learning?
What might be the difference?

Jerome Bruner makes reference to personalized learning in his early works, The Process of Education (1960) and Towards a Theory of Instruction (1966).  This quote struck me as especially powerful when thinking about personalized education:

"To personalize knowledge one does not simply link it to the familiar.
Rather, one makes the familiar an instance of a more general case and thereby produces awareness of it" (1966, p. 161).

Educators who think personalized learning should be tailored specifically to the interests of a student are missing the point.  To make a child's entire education about football, music, robots, or anything else is doing the opposite of what education should be.  Education should open a child's eyes to make broad connections while transmitting culture.  Letting a child focus on one small slice of life for overly extended amounts of time does not build connections.

Bruner's view of instruction moves the child into ever wider concentric circles, each one with a larger worldview.  A continual movement from specific to general.  Personalized learning uses what is familiar to aid this movement.  To me, this is the opposite of specialization, in which a student becomes more and more adept at a single skill or domain.  Specializing learning in this way (letting a child focus exclusively on one type of content) is harmful to young students in the long run.